Bimetal tibial component construct for knee joint prosthesis
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United States of America Patent
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Mar 13, 2007
Grant Date -
Dec 30, 2004
app pub date -
Nov 25, 2003
filing date -
May 14, 1998
priority date (Note) -
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Abstract
A prosthetic tibial component for a prosthetic total knee joint includes two constructs, one being a metal base that engages a bone and the other being a polyethylene bearing that attaches to the metal base and articulates with a femoral prosthetic component on a opposing side of the joint. The metal base is composed of two metals, one of which engages the bone surface and the other of which engages the polyethylene bearing. Each of the metals is selected for its function. The first metal is selected to provide a superior bone-engaging face, while the second metal is selected to provide a superior polyethylene-engaging face. By combining the different material characteristics of two different metals there is formed a superior bone-engaging face and a superior polyethylene-engaging face.
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